| Author | Message | ||
     Tbowdre |
anyone know how much quieter the FMF slip on is with the quiet core insert installed? Does it really quiet the exhaust that much? maybe it just decreases performance too much to care! todd | ||
| Jdugger |
I've got it so the small side points to the engine.. the "quiet" setting. Well, a buddy of mine has a skeet shooting range about 1/2-3/4 of a mile away from the local race track. He can CLEARLY HEAR my bike from that distance, and can easily tell where I am on the track because of shifting patterns. The FMF is completely inappropriate for the street, IMHO. Great pipe, great sound, unbelievably, incredibly, amazingly, awesomely STUPID LOUD. LOUD. LOUD. LOUD. | ||
| Fresnobuell |
JD--I don't think it's as loud as you are making it out to be. It's loud for sure, but not D&D loud. I agree its a great pipe. | ||
| Barker |
for me it was still way too loud for my personal tastes. My neighbors will still hate me, so left it out. I did not run the numbers, but most FMF buellers claim it zaps powah. | ||
| Fresnobuell |
I did not run the numbers, but most FMF buellers claim it zaps powah. Please direct me where those claims have been made...} | ||
| Lovedabueller |
jdugger, that is at FULL TROTTLE on a track, on the street you can ride in that quiet harmonic, range that makes the bike quiet.. i have a short homemade pipe and i can not hear it, when its two blocks over with the baffle in it...(my dad was on the bike) with out the baffle and Full throttle it will be crazy im betting.....just my .02 | ||
| Jdugger |
The D&D has a very bight and raspy sound, so in many ways I think it's more upsetting than the FMF. But, I really don't think I'm overstating the FMF. Granted, we all have personal tastes and thresholds, and certainly my personal perception colors my opinion here. I would be embarrassed to ride a bike that loud on the street. I easily have one of the loudest bikes at the track now. I'd not be permitted on-track at Laguna Seca... I'll measure the bike at idle and at near red line and report back... I've got a sound pressure level meter. At 1 meter, it's easily above 100db. Easily. | ||
| Barker |
D&D is ridiculous loud, but it does sound like a stock car.  | ||
| Fresnobuell |
I agree it's probably too loud on the limit--and I am pretty sensitive to the noise thing. As Zac posted about his Drummer, it's possible to lower your offensiveness by keeping the revs down and park away from areas with lots of foot traffic. I have my FMF on the dedicated track bike and a new FMF in the box for my new street bike. I am hesitant to put the new FMF on my new street R. I will probably keep the stocker on, although I dislike the heft of it. That is, unless the K&N, EBR race ECM & slip on combo proves to be an irresistible. | ||
| Tbowdre |
??? yes it is loud.... I was wondering if anyone knows the difference in loudness between quiet core installed and with no quiet core is it a big difference in decibels? thanks again todd | ||
| Blazin_buell |
After 2 yrs with the Death&Doom exhaust I can fully say that it can be the most exhilarating sound to most and the most irritating to others, me included ,that's why I ended up making my own. I had db readings done at an outing and surprisingly the Jardine was 6db louder than my D&D at idle and at 7k rpm. I always thought it would be the opposite. The main thing is the higher pitch of the D&D that makes it seem so much louder/irritating. | ||
| Jdugger |
Right. Surprisingly to many, "loud" is actually quite a subjective concept. It has to do with the human ear's sensitivity to mid-range frequencies vs. bass. So, it's entirely possible, even likely, actually, that an exhaust with a lot of low-end (bass) will have a higher sound pressure level, but not be "as loud". But SPLs, and in particular bass, are what shake walls, sets off car alarms, and otherwise really irritates neighbors. So, when measuring exhausts' SPLs, the results will depend on which weighting curve is used. dBA is the curve commonly accepted as "reasonably like human perception", where dBC is more objective. dBC will generally read higher. In electronics work, dBA is generally used by lower-quality audio equipment because it helps cover up a lot of sins, like power supply noise getting into the circuits. And, of course, the major contributor is distance, inverse square law and all. For example, one of the ways the Chinese generator manufacturers are getting noise levels like the ultra-quiet Honda is simply measure them from twice as far away. | ||
| Ponti1 |
For example, one of the ways the Chinese generator manufacturers are getting noise levels like the ultra-quiet Honda is simply measure them from twice as far away.  Why is this so believable? Those crazy Chinese folks... | ||
| Avc8130 |
Why would you want a pipe that dicated how you had to ride just to keep the noise down? Why would I want to HAVE to cruise around at lower RPMs or park in certain areas? Most people want the slip-ons because the stocker is "ugly". If you get the slip on and have to park 3 blocks away because you don't want to piss anyone off, no one will see its beauty anyways. I don't get it. ac | ||
| Bob_thompson |
I guess not many here on BadWeb have caught my previous posts on quieting some of these mostly straight through muffler systems and thats OK. But for those that are interested I will post it again. These two inserts (links below) are proven designs used by many top drag racers on strips around the nation which are nearby residential neighborhoods and have noise restrictions. I have also proved their use myself but not on a dyno; others have. They use engineered designs based on air flow and show a fair amount of noise reduction without reducing air flow, torque and H.P significantly. Many are used directly in the header's collector pipe with no muffler. They do not always have small enough sizes to fit all pipes/mufflers but can be easily fabricated as I have done myself with a minimum of time and tools. Both DO WORK as advertised and thats not just my opinion. Finally my thought would be to choose the pipe/muffler you like and can afford and stick one of these in for the street and remove for track days. Maybe the best of both worlds. I'm using one right now with my own straight through muffler system right now. Just my FWIW observation. Bob "www.carchemistry.com" "www.afabcorp.com/AFCO_Dynatech_USbrake/merchant.mv c?Screen=CTGY&Store_Code=Dynatech&Category_Code=Mu fflers" | ||
| Dannybuell |
Bob_thompson; those cones were interesting, the split flow style mufflers with with stainless packing looks pretty nice. dannybuell | ||
| Jdugger |
I'm about ready to consider some kind of noise control for the FMF pipe. Even for something used exclusively as a track bike, it's so loud at idle I can't be around it without earplugs and everyone has to shout to communicate in the paddock when I'm warming up. It's so *stupid* loud. I simply can't imagine someone finding this pipe even remotely appropriate for the street. | ||
| Tbowdre |
Oh please- really? "inappropriate", *stupid* do you people live in a little bubble town with no garbage trucks, weed eaters, lawn mowers, airplanes, dogs barking, construction work. Lots of things make annoying noise. I hardly think a motorcycle exhaust note is a big issue. Usually it is there for 2 seconds and then it moves on... I started this thread with a question and got a lot of opinions about decibels... LOL Seems like no one knows if the quiet core makes a difference todd | ||
| Avc8130 |
Todd, EVERY thing in your list there is sound controlled by law...including your motorcycle. ac | ||
| Illbuell |
Law....BOOOOOOOO LOL. My RT-5 is to loud for me on long rides at 75+mph.. Rings my ears pretty good. Around town I love it. | ||
| Avc8130 |
Yeah, that is the main reason I have stayed away from a slip on. I like to do long rides with my bike. I lost 50% of my hearing in one ear on a full-day ride on my SV650 with slip-on. Last year I was able to enjoy Indy to NJ (750+ miles) in one day on my stock pipe. I do wear ear plugs or noise-isolating headphones now. Live and learn. ac | ||
| Hdwrenchtx |
I guess the law makes those guys with the weedeaters and leaf blowers wear hearing protection too. | ||
| Avc8130 |
No, but the owner's manuals clearly recommend it. I wear hearing protection when I use my mower and trimmer. Once you lose some hearing, you will really learn to cherish what is left. ac | ||
| Brumbear |
The only problems I have with overloud exhausts are when we bomb down the backroads the cops can here us coming that aint good.And I am getting old and it gives me a headache. | ||
| Bob_thompson |
This and other threads about how loud is loud and what is acceptable is mostly our own opinions and they vary considerably. For me, I do agree there are muffler systems and exhausts that are irritating to our ears and maybe best suited to the track. I do not think noise on the track should be substantially suppressed as its kind of "part of the racing experience" Pretty exciting to hear Danny's 1125R coming down the straights at almost any track, and its LOUD! The Bonneville salt flats is something to behold at the big end. If it bothers you at the track just wear some protection. Now on the street I also do not want to offend anybody especially the people who do not enjoy motorcycles BUT, I have my system at just the right sound level. More throaty, louder then stock, making better performance and not offending. I have even asked many what they think and most agree it sounds great. I love its nice sound when cruising and it does not draw nearly as much attention as the, just plain LOUD, irritating sound of some HD's or foreign 4's with pipes. To each his own but it should be free choice not the governments, or anybodies but yours, within reason, so just use common sense and ride safe and sane. Bob | ||
| Avc8130 |
Bob, The problem with "free choice" is what about the guy who wants to sit on his front porch and have the "free choice" of NOT listening to your race bike roar around his neighborhood? Tracks with noise restraints make sense. NO town wants 30 bikes with 100+db mufflers flying around all weekend. This is EXACTLY why most new tracks have difficulty getting through permitting at their local town level. Sure, YOU/WE think it is part of the "experience", but the majority of people are not interested in this "experience". My stock muffler almost failed NJ inspection because the inspector thought it was too loud. I showed him the EPA tag and he asked if I modified it! ac (Message edited by avc8130 on February 07, 2010) | ||
| Bob_thompson |
Anthony(Avc8130), with all due respect, but I think you may have missed where I said, "within reason and use common sense" Also I do not have a "race bike" and I ride very slow and carefully in my neighborhood. COMMON SENSE. Seems like its way too crowded where you live and play. Inner city tracks have almost all shut down due to town or city ordinances. I know as I grew up in the metro Chicago area and am now enjoying my new freedom here. You are also right you must adapt to where you live to ride free. Bob | ||
| Avc8130 |
Bob, I saw that you said "common sense"...unfortunately there are enough jackasses out there without common sense to ruin it for the rest of us. Don't worry, eventually enough "city folk" will move out to the country to escape "the confines of city life". Amazingly they tend to bring those same "confines" with them. I have seen it happen in the less populated areas around me. I agree, keep it reasonable. I just don't see the point in putting some "race" pipe on the bike and then having to ride slow conscientiously just because of the pipe. I would rather keep the quiet pipe and not worry about it at all. Then you are MORE free to use the bike how you wish. ac | ||
| Jdugger |
> Oh please- really? "inappropriate", > *stupid* do you people live in a little > bubble town with no garbage trucks, weed Maybe I should have used the phrase "crazy loud" instead? Everyone's sensibility is different, for sure, but let me share some of my experiences with the FMF slip-on. * My buddies family owns a trap-shoot range about 1/2-3/4 mile from the track. He can CLEARLY hear me over anyone else on the track from the shooting range above the noise of shotguns. * In the paddock, with the bike at idle, one needs to shout to carry on a conversation. * One of the guys I ride with has a GSXR-1K. He lost his slip-on, so his is a STRAIGHT PIPE. My bike at idle is way louder than his at full throttle. * I scare people on track. One of the local racers sometimes has students on track that are a little slower than race pace. They get spooked when they here me come up on them, and then take erratic lines or look back, DESPITE us telling them to NEVER do that. It's human nature. * I'm easily the loudest bike in the paddock. * Even with good earplugs in (30db foamies) I get tired of hearing the motor after a 30 minute session. It's way louder than the wind (at a buck-30 on the back straight!) in my helmet now! > Seems like no one knows if the quiet core makes a difference Well, my experience is with the FMF and the quiet core installed to the quiet setting. So, take that for what it's worth. I have no intention of trying to tell you what to do here, but given my experience set with this pipe in its *quiet* setting, is it understandable how I could come to the conclusion it's inappropriate for the street? There's no way you could run this pipe in an inner-city neighborhood and not get the cops called on you. I think even in the suburbs you are going to need to be quick about getting in and out. If on a commute bike, you and everyone around you are going to get tired of hearing this thing at 4-5k drone on. Hey, it's my opinion, but when it can be heard easily above shotguns 3/4ths of a mile away one wonders how someone could imagine running this thing on the street. | ||
| Fresnobuell |
One of the guys I ride with has a GSXR-1K. He lost his slip-on, so his is a STRAIGHT PIPE. My bike at idle is way louder than his at full throttle. C'mon. With all due respect, that is a slight exaggeration. Maybe because you experience your idle up close and his bike many feet away or with helmet/earplugs. I have heard both the FMF at idle (yes, loud) and straight thru IL4 pipes and will not agree that an idling FMF is louder than a straight thru at full song. |
